Boots – shoes – and leggings
Patent
1986-03-07
1989-03-14
Shaw, Gareth D.
Boots, shoes, and leggings
G06F 1208, G06F 1300
Patent
active
048129674
ABSTRACT:
At an occurrence of an interrupt, each entry of the vector table of the vitrual machine monitor to be referenced by the hardware of the bare machine is loaded with an address of an interrupt processing program of the running virtual machine for an interrupt number associated with the entry. When the interrupt is allowed to be directly processed by the virtual machine, the virtual machine monitor is not activated, that is, the interrupt processing program of the vitual machine can immediately execute the necessary processing, which eliminates the overhead associated with the intervention of the virtual machine monitor. Moreover, the content of the system stack pointer is set to point to the stack of the running virtual machine. Consequently, the content of the registers to be saved for an interrupt processing are directly stored in the stack of the running virtual machine, and therefore the overhead caused because the stack of the virtual machine monitor is used is removed.
REFERENCES:
patent: 4253145 (1981-02-01), Goldberg
patent: 4400769 (1983-08-01), Kaneda et al.
patent: 4456954 (1984-06-01), Bullions, III et al.
patent: 4459661 (1984-07-01), Kaneda et al.
patent: 4564903 (1986-01-01), Guyette et al.
Hirosawa Toshio
Kurihara Jun'ichi
Okumura Shigemi
Hitachi , Ltd.
Ruiz Adolfo
Shaw Gareth D.
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